Board machine



Aprir 9, 1935. 1 C, L, ELUS Re. 19,521

BOARD MACHINE Original Filed Oct. v16. A1930 2 Sheets-Sheet 1 c. L. ELLIS l Re. 19,521 BOARD MACHINE l April 9, 1935.

2 Sheets-Sheet 2 Original Filed Oct. 16, 1950 PATENT oFFlcE BoAan MACHINE Charles L. Ellis, Bradford Hills, Pa., assignor to l Downingtown Manufacturing Company, Downingtown, Pa., a corporation of Pennsylvania Original No. 1,879,143, dated September 27, 1932,

Serial No. 489,215, c tion for reissue Ma 40 Claims.

This invention relates to cylinder papermachines, and more particularly to an apparatus for transferring the formed paper web from the wet end of such machines to the press section of the machine.

An important object of the invention is to provide a structure delivering the paper web or sheet formed on the cylinder molds to the rst press in a much drier condition than has heretofore been possible and to attain this resull;s without the use of the usual primary press ro A further object of the invention is the vprovision of a structure of this character eliminating the use of one of the usual long felts with its accompanying equipment ofv felt rolls, guide rolls, stretchers, whippers and the like, thereby reducing the power required in operation and elim- ;gitting the losses due tothe deterioration of such A further'and more specic object of the invention is the provision of a structure of this character wherein the paper web or sheet is delivered to an endless carrier preferably consisting of a wire by means of which it is transferred to the rst press, the sheet While on the carrier being subjected to the action of a suction roll or' rolls.

A further object of the invention is to provide in a construction of this character an arrangement such that the pick-up felt and web after leaving the last cylinder of the machine may be acted upon by an extractor press so that when `the felt moves to deliver the web to the endless carrier such web is dried to an extent that any extensive press action is unnecessary before the web is delivered to the drier.

'I'hese and other-objects I attain by the construction shown in the accompanying drawings wherein, for YVthe purpose of illustration, I have shown a preferred embodiment of myinvention and wherein:

Fig.` 1 is a side elevation of a cylinder paper machine illustrating a portion of the cylinder and press parts thereofand the intermediate transfer mechanism;

Fig. 2 is an enlarged diagrammatic view of the transfer mechanism;

Fig. 3 is a fragmentary diagrammatic View showing a possible modification of the arrangement of Figs. 1 and 2;

Fig.. 4 is a semi-diagrammatic view illustrating a modification of the arrangement of Fig. l to .include the use of an extractor press;

Fig. 5 is a view similar to that .of Fig. 4 illustrating the substitution of a felt for the wire as an endless carrier; and

Fig. 6 is a fragmentary detail view showing the construction of the bottom roll of the extractor press.

Referring now more particularly to the drawtober 16, 1930. Applicarch 9, 1933, Serial No.

(ci. :i2- 42) y ings, and more particularly to Figs. 1 to 3 thereof, the numeral Ill indicates a cylinder vat which may constitute the solitary vat of the machine or the final of a series of such vats. 'Ihis vatg-yhas arranged therein the usual cylinder mold I I upon which operates a couch roll I2. Inspaced relation to the vat I0 is disposed a final press section I3. Between the vat Il) and the final press section I3 I disposea transfer mechanism generally designated at I4 includnga wire I5 passing over an end wire roll IE of any ordinary or usual construction, arranged adjacent the vat, through a suction pressl comprising a transfer suction roll Il and an imposed top roll I8 therefor, over an endk roll I9, preferably a suction roll, disposed adjacent the press I3 and then back to the end wire roll IE, this stretch of the wire having associated therewith the usual stretch roll 20 and Wire guides 2l and 22 which may be of the type ordinarily employed in such location.

The pick-up felt 23 of the vat end of the machine passes over the wire from the'end wire roll I6 to the suction press roll Il from which p oint it is returned over the top press roll I8 to the vat end of the machine.' The paper web or sheet W picked up by the cylinder mold is transferred to the'felt 23 and passes with this felt over the wire to the suction press roll I1. By this roll it is transferred to the wire and from this point moves with the wire t the suction end roll I9 where it is again subjected to the action of suction and transferred to the press en d of the machine. Instead of the/usual suction roll, as illustrated in Figs. 1 and 2, a suction roll having a porous, resilient covering Il-a may be employed 'if so desired. This covering will tend to shield the wire from the rapid'wear ordinarily resulting when thewire is passed directly over a suction roll.

' Use of apparatus of this character in transferring the paper web W from the cylinder to the press vend of the machine results in the production of a sheet free from felt marks which can bel produced at a much higher speed and with much less pressing and expenditure 'of power than is ordinarily necessary. Furthermore, the `losses due to shrinkage with a construction oi.' this characterl are materially'reduced.

The structure just described is that set forth in my-prionapplication, Serial No. 462,561 for was filed June 20, 1930, and of which application this application is in part a continuation. In Fig. 4 I have illustrated a modification of the foregoing structure wherein, instead of depending upon the suction press, designated by the upper and lower rolls I1 and I8, for theremoval of such a quantity of Water as it will necessarily remove with the arrangement shown in these gures, I provide between the final cylinder mold patent on Multi-cylinder board machine, which there is only associated with the paper web the felt 23 with the result that the extractor press removes considerable water from both the felt and the paper web, some of this water passing through the surface of the extractor roll 25 while the remainder thereof collects between the rolls 25 and 26 and is deflected by a sluice 291 The wire covering of the extractor, roll, not having the same ainity for the paper web as the felt,

`does not remove the web from the felt but permits it to continue with the felt until it passes through the suction transfer press consisting of the rolls I1 and I8. The suction transfer press removes further water and serves to separate the paper web from the felt, which felt returns over the top of the cylinder mold or molds to again begin its pick-up travel while the web moves over the endless carrier to the final press I3. The extractor press 24 removes a very considerable amount of water from the paper, this amount generally being between one and one-half (l1/2) and two (2) tons per ton of paper nally produced by the machine. Due to the amount` of water removed by the extractor press, a press felt may be substituted for the wire in a construction of this character if so desired, this arrangement being suggested in Fig. 5, the sole changes necessary to this arrangement being the provision of a take-up for the felt 9-a as suggested at 3U. It will be noted that in each of the constructions the use of a long felt is eliminated with its associated mechanisms, thusmaterially reducing thel actual cost of construction of the board machine and 'since the paper web produced may be delivered to the driers with a much smaller water content and at a much higher rate of speed than is possible with the ordinary machine, the eii'iciency of the entire organization is materially increased.

Since the structure hereinbefore set forth is but one of a number which might be adapted without departing from the spirit of my invention,

I do not wish to -be understood as limiting myself thereto except as' hereinafter claimed.

Iclaim:l Y 1. The combination with Aa cylinder board machine including the usual endless felt receiving the wet pulp from the cylinder mold,'of an endless wire over which the felt passes and a pair of` transfer press rolls between which the felt, the pulp and the wire pass, said transfer press rolls being so constructed and arranged that the pulp is transferred from the felt to the wire.

2. In a cylinder board machine having the usual endless pick-up felt and press end, means for transferring the pulp to the press end comprising an endless wire and a press including a suction rroll acting through the wire for transferring the pulp from the felt to the endless wire. V3.' In combination with a cylinder board machine comprising a wet end having the usual piekup felt and the usual main press section, an endless wire receiving the pulp from said pick-up felt and transferring it directly to the main press section, and at least one suction roll associated with said endless wire to act upon the pulp through the wire during its passage thereover and to assist in the transfer of the pulp from said pick-up felt to the wire.

4. In combination with a cylinder board machine comprising a wet end having the usual pick-up felt and the usual main press section, an endless wire receiving the pulp from said pickup felt and transferring it directly to the main press section, and a plurality of suction rolls associated with said wire to act upon the pulp through the wire during its passage thereover, one of said suction rolls assisting in the transfer of the pulp from the pick-up felt to the wire.

5. The combination with a cylinder paper machine including the usual endless felt for receiv- 'ing the wet pulp from the cylinder mold, of an pulp and the wire pass, whereby the pulp is transf' ferred to the wire, and an extractor press between the rolls of which the felt passes prior to joining the wire.

7. 'I'he combination with a cylinder paper machine including the usual endless felt for receiving the wet pulp from the cylinder mold, of an endless wire, a press including a suction roll over which the wire, the pulp and the feltpass with the wire contacting directly with the suction roll, whereby the pulp is transferred to the endless wire, andan extractor press between the rolls of which the felt passes prior to joining the wire.

8. lIn combination with a cylinder paper machine and a wet end having'the usual pick-up lfelt and the usual press section, an endless wire receiving the pulp from said pick-up felt and transferring it directly to the .press end of the 1 machine, at least one suction roll contacting directly with said endless wire to act upon the pulp during its passage thereover, and an extractor press between the rolls of which the felt passes prior to joining the wire. .l

9. In combination with a cylinder paper machine and a wet end having the usual pick-up felt and the usual press section, anendless wire receiving the pulp from ksaid pickup felt and transferring it directly to the press end of the machine,

atleast one suction roll contacting directly with` said endless wire to act upon the pulp during its passage thereover andto ,assist in the transfer of the pulp rfrom said pick-up :felt to the wire, Aand an extractor press between the rolls of which the felt passes prior to joining the wire.

10. In a paper machine, a pulp web-forming Amechanism including a pick-up felt, a press section toward which the operative run of the felt moves, an extractor press through which the felt and `its attached web pass immediately after vcompletion of the pick-up run, an endless wire for transferring the web directly to the press section and means for transferring the web fromv said felt to the wire, including a suction roll with which the wire is in direct contact acting through the wire, the web, and the felt.

l1. In a cylinder paper. machine comprising a der.' mold through said extractor press andk through said suction press, each of said ex-` tractor press and suction press including a roll and atyvire directly engaging the paper web accumulated by the felt in its passage over the cylinder mold through which the roll acts.

13. In the process of removing Water from a viibrousvveb built up on the carrier felt in a.

cylinder type of paper making machine, the step which comprises contacting said web and carrier felt directly against a bare foraminous carrier, applying suction through the foraminous carrier and then delivering the web to a press.

14. 'I'he combination in a cylinder-board machine including the usual endless felt receiving the wet pulp fromthe cylinder mold. of an endless Wire over which the felt passes with the web in contact with the wire, and means for .exerting suction on the felt and web through the wire.

15. The method of manufacturing paper comprising collecting a paper web upon Va felt carrier and then successively subjecting the felt and web to pressure and suction while protecting the exposed surface of the web by a screen supporting means directly engaging the web.

16. The method of manufacturing paper comprising collecting a paper web upon ayfelt carrierand then subjecting the felt andweb to pressure and suction while protecting the exposed surface of the web by a screen support directly engaging the web and through which the suction is exerted.l

1'?. The method of manufacturing paper com.- prising collecting a paper web upo`n a felt carrier and then subjecting the felt and web to suction while protecting-the exposedsurface of the web by a screen support directly eng-aging the web and through which the suction is exerted.

lfApparatus for making paper, comprising means for collecting pulp upon a screen surface, a felt engaging the pulp to remove it from said surface, a press acting upon the felt and pulp immediately following the removal of the pulp-from said screen, said press vincluding a screen surface directly engaging the pulp during the operation of the press to thereby prevent dislocation ofthe fibres during the pressing operation, a second felt roll acting upon the pulp Vthrough said second felt.

19. Apparatus for making paper, comprising means for collecting pulp upon a screen surface, a felt engaging the pulp to remove it from said surface, a press acting upon the felt and pulp immediately following the removal of the pulp from said screen, said press including a screen surface directly engaging the pulp during the operation of the press to therebyrprevent dislocation of the fibres during the pressing operation, an endless carrier joining the felt and pulp following such pressing operation and engaging the exposed surface. of the pulp, and a tion, a press section, the forming joining the felt and pulp" following said pressing operation and'engaging' the exposed surface of the pulp, and a suctionY suction rollv acting on. the pulp through said endless carrier.

20. Apparatus for making paper. comprising means for collecting pulp upon a screen surface, a felt engaging the pulp to remove it from said surface, a press 'acting'upon the felt and pulp immediately following the removal of the pulp from said screen, said press including a screen surface directly engaging the pulp during the operation of the press to thereby prevent dislocation of the fibres during the pressing operation, an end.`

less carrierjoining the felt and web following such pressing operation and engaging the exposedsurface of the pulp, through which the felt, the carrier and the 'pulp pass. f'

21. Apparatus for making paper, comprising means for collecting pulp upon a screen surface, a felt engaging the pulp t'o remove it from said surface, a press acting upon the felt and pulp immediatelyy following the removal of the pulp from said screen, said press including a screen surface directly engaging the pulp during the operation of the press to thereby prevent dislocation of the fibres duringvthe pressing operation, a second feit joining the felt such pressing operation and engaging the exposed surface of the pulp, and a suction press acting on the pulp through said second felt.

22. In` a cylinder paper machine, a forming section comprising a cylinder mold and a pickup felt co-acting therewith to remove the pulp web from the cylinder mold, a suction press through which the pick-up felt passes while the web is still at the lower face of the felt, an endless carrier passing throughsaid press and protecting the exposed face of the Web, and means extracting water from the felt and web intermediate said cylinder mold and suction press, including a screen surface supporting and protecting the exposed face of the web.

23. In a cylinder paper machine, a forming section comprising a cylinder mold and a pick-up vfelt co-acting therewith to remove the pulp web from the cylinder mold, a suction roll acting upon the felt and web while the web is still at the lower face of the felt and from that face of' the felt at which the web is'disposed, an -endless carrier passing between said suction roll and the web and protecting the exposed face of the web during the operation of the suction roll' thereon, and means extracting water from the felt and web intermediate said cylinder mold and suction press including a screen surface supporting and protecting the exposed face-of the web.

24. In a cylinder paper machine, a forming secing a cylinder mold and a'pick-up felt engaging Ythe mold to remove a web therefrom while movsection compris-I and a suction press and pulp following passing through a press of the' press section with which the pick-up felt and web are joined while the web is at the under face of the pick-up felt.

25. In a cylinder paper machine, a forming section, a press section, the forming section comprising a cylinder mold and a pick-up felt engaging the mold to remove a web therefrom while moving toward the press section, and an endless carrier having its upper lrun moving toward and passing through a press of the press section with which the pick-up felt and web are joined while theweb is at the under face of the pick-up felt,

said press comprising a suction roll the pick-up I felt likewise passing through said press.

.26. In a cylinder paper machine, a forming section, a press section, the forming section cornprising a cylinder mold and a pick-up felt engaging the mold to remove a web therefrom while moving toward the press section, and an endless felt having its upper run moving toward and passing through a press of the press section with which the pick-up felt andweb are joined while the web is at the under vface of the pick-up felt,l said press comprising a suction roll acting on the web through the endless felt.

27. In a cylinder paper machine, a forming section, a press section, the forming section comprising a cylinder mold and a pick-up felt engaging the mold to remove a web therefrom while moving toward the press section, and an endless screen having its upper run moving toward and passing through a press of the press section with which the pick-up felt and webare joined while the web is at the under face of thepick-up feltJ said press including a suction roll.

28. In a cylinder paper machine, a forming sec'- tion, a press section, the forming section comprising a. cylinder `mold and a pick-up felt engaging the mold to remove a web therefrom while moving toward the press section, and an endless screen having its upper run moving toward and passing through a press of the press section with which the pick-up felt and web are joined while the web is at the under face of the pick-up felt, said press including a suction roll acting on the web.A through the endless screen.

29. The combination with a cylinder'paper machine including the usual endless felt receiving the wet pulpl from the cylinder mold, of an endless wire and a suction roll over which the wire, the'pulp, and the felt pass, whereby water is removed from the pulp. I

30. The combination with a cylinder paper machine including the usual endless Vfelt receiving the'wet pulp from the cylinder mold, of an endless wire over which the felt carrying the web passes and a pair of rolls between which the felt, 'the pulp and the wire pass with the pulp web beingadjacent to the wire, for thel purpose of de-watering the web.

31. 'Ihe combination :with a cylinder paper machine including the usual endless felt receiving "the wet pulp from the cylinder molds, of an endless wire over which the web carrying felt passes and a pair of rolls between which the felt, the pulp and the wire pass with the pulp in contact with the wire; one of the rolls adjacent to the wire being a suction roll for the purpose of removing water from `the web on the felt before being acted upon by the` press section of the machine. y

32. In a paper machine of the cylinder type, the combination of a fibrous web forming part, a pick up felt for receiving the fibrous web on the under side thereof, a foraminous carrier positioned after said forming part for receiving the fibrous web, means comprising a suction roll to transfer said fibrous web from said felt to the foraminous carrier and extracting means to removewater from said fibrous web Without distorting and crushing the web.

33. In a cylinder type of paper machine including a plurality of web forming molds and a pick up feljt for receiving transferring the composite web so formed, a foraminous carrier for receiving the composite web directly from said pick up felt anda suction roll over which the :carrier is trained for removing water from said composite web.

34. In a cylinder type of paper machine including cylinder molds and a pick up felt for collecting the brous web from the cylinder molds. a foraminous extractor roll positioned after the last cylinder mold for receiving the pick up felt and-the fibrous web thereon to remove water therefrom, a Fourdrnier wire for supporting the brous web on the pick up felt and suction means to transfer the fibrous web from said felt to said Wire while aiding in the removal of water from the fibers.

35. The method of making paper'which comprises building up'a composite web of fibrous material on a pick up felt," transferring said web by means of suction to a foraminous wire, extracting water from said web by means of suction applied -through the wire and nally subjecting the'web alone toheavy pressures to remove further quantities of water therefrom.

36. The method-of making paper which comprises building up a composite web of brous ma-l terial on a pick up felt, gently extracting Water Y from the web while carried by said pick up felt, transferring said web by means of suction to a foraminous Wire, extracting further quantities of water from said web by means of suctionV ap-- plied through the wire, and subjecting the web alone to heavy pressures to remove further quantities of water therefrom.

37. In the manufacture of paper on a cylinder type of paper machine, the step of gently'extracting water from the wet web of paper while said web is supported on a foraminous carrier to dry the web sufiiciently so that it is not crushed or distorted when subjected to heavy pressuresv transfer from said pick up felt to. said carrier;

said 'suction means also aiding in the removal of water from' said composite web.

39. A cylinder type of paper machine comprising a web-forming part including a pick-up felt, water extracting means positioned immediately after said web-forming part, foraminous carrier means to support the web, suction means for transferring the web to the-carrier means, additional suction means to further dry the web while supported on a carrier means, and press y roll and drying means positioned after said suction means.

40. In the process of making paper, the step of building a composite web of fibrous material on a pick-up felt, subjecting the pick-up felt and web thereon to a gentle water extraction treat- 'ment without the aid of suction, supporting the so treated web on a foraminous carrier belt and removing further quantities of water from the web by means of suction applied through.said belt.

i CHARLES L. ELLIS,` 

